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Biochemistry General b9febb73

The primary defect in Xeroderma pigmentosa is

A
Formation of thymidine dimmers
B
Poly ADP ribose polymerase is defective
C
Exonuclease is defective
D
Formation of adenine dimmers
High-Yield Explanation
In xerodenna pigmentosa; nucleotide excision repair of damaged DNA is defective due to formation of TT dimers.

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